Cellular phones started out as monstrous bricks. The first one I saw was being carried by a man in a suit walking through the mall. It had a handset attached to a coiled cord that went down inside a bulky-looking box with a handle and antenna on the top. It was comical. I laughed out loud. And then I stopped in my tracks. "This guy is talking on the phone -- while he's walking through the mall," I thought. It was earth-shaking. Something magical happened next: the possibilities of telephones that didn't need to be tethered to the kitchen wall went rushing through my head. Either that or ...